MTTR (Mean Time to Repair)
A core maintenance KPI measuring how long it takes, on average, to restore an asset to working condition after failure.
Definition
MTTR (Mean Time to Repair) is the average time taken to fully repair a failed asset and return it to service, from the moment failure is detected through the completion of the repair work order.
The MTTR formula
MTTR = total repair time across incidents ÷ number of incidents, measured in hours.
Lower is better. MTTR captures diagnostic, waiting, repair, and verification time — so parts availability, procedure quality, and technician skill all influence it.
Why MTTR matters
MTTR translates maintenance performance into downtime cost. A critical production asset with a shorter MTTR costs less per failure and has a smaller business impact. Tracking MTTR by asset class exposes whether the bottleneck is parts, procedures, or people.
How FacilityLane tracks MTTR
Every FacilityLane work order records detection timestamp, acknowledgement, and completion. MTTR is computed per asset, per asset class, and per site in the reporting dashboards — and LAYLA can answer plain-English questions like “what's our MTTR for HVAC chillers this quarter?”.
FAQ
Common questions about MTTR (Mean Time to Repair).
There is no universal target. Benchmarks depend on asset class and criticality. The useful practice is to establish a baseline for each asset class and track trend improvement over time.
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